Super narrow lightweight 12-speed Hyperglide+ chain for smooth shifts and maximum durability Shimano 12-speed Hyperglide+ chains have computer designed plate profiles to operate seamlessly with Shimano DCE 12-speed chainrings and cassette sprockets, resulting in 1/3 faster shift time than Hyperglide systems even under load Outer plate design has been developed to reduce the chance of chain suck Sil-Tec surface treatment technology (PTFE plating) on inner and outer links and rollers that is smooth running and increases durability For use with 12-speed HG+ drivetrains Comes complete with Quick Link which enables fast tool free chain assembly Speed 12 Speed